激光熔覆三维成型变截面试件的实验研究
Study on Three-dimensional Variable Workpieces by Laser Cladding Forming
吴少华1,2， 石世宏2， 蔡齐飞2， 石皋莲1
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作者单位：1.苏州工业职业技术学院，江苏 苏州 215104； 2.苏州大学 机电工程学院，江苏 苏州 215021
中文关键字：激光熔覆； 光内同轴送粉； 快速成型； 复杂零件堆积
英文关键字： laser cladding; light inside coaxial send powder; rapid formation; complex parts cladding
中文摘要：基于自主研发的新型喷嘴，设计了采用光内送粉方式进行变截面试件堆积的模型。变截面复杂零件的堆积实验表明：采用层高开环控制，不断改变并实时监测影响高层堆积的z轴增量，保证离焦量基本不变，可以制作出267层的高层堆积件。对所堆积的三维回转体成型件的宏观与微观质量分析检测表明：变截面三维零件内部组织致密，硬度高且分布均匀，晶粒细小，表面粗糙度良好，微观质量较好。
英文摘要：Based on the independently developed new-style nozzle , the model for light inside powder feeding to make variable cross-section stacking was designed. The experiment on variable cross-section stacking proves that with high level open-loop control, constantly changing and monitoring z-axis increment, the stability of defocusing distance can be ensured, a 267-storey stacking piece can be made. The macroscopic and microscopic quality inspection of 3D revolution body of the stacking piece shows that it has the characteristic of high-density tissue, uniform hardness, fine grain, modest degree of roughness and high quality.